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Finding the Fourth Proportional to 656,854,978.74, 906,462,272.16 and 355,440,291.90

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Solution

The fourth proportional to 656,854,978.74, 906,462,272.16 and 355,440,291.90 is: 490,508,902.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,854,978.74 : 906,462,272.16 = 355,440,291.90 : x
  2. Step 2: Convert to fraction form
    656,854,978.74/906,462,272.16 = 355,440,291.90/x
  3. Step 3: Cross multiply
    656,854,978.74x = 906,462,272.16 × 355,440,291.90
  4. Step 4: Simplify right side
    656,854,978.74x = 322,193,214,612,887,616
  5. Step 5: Solve for x
    x = 322,193,214,612,887,616/656,854,978.74
  6. Step 6: Final answer
    x = 490,508,902.33

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